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8/8/2019 All About HDTV
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All About HDTV
TCF April 2008
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They Look Great 50 Vizio
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All About HDTV - Outline Digital TV (DTV) and High Definition (HDTV)
Frequency Allocation
What are Broadcasters Doing
Where are the Signals Coming from
Plasma, LCD and DLP Displays
How to Hook Up HDTV to Your System HD Recording
Consumer Guide
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Digital TV and HDTV OTA Analog transmissions to cease in 2009
after over 50 years. DTV offers better picture
quality no snowy or degraded picture, noconvergence problems
Each pixel separately generated
Stereo and surround sound (5.1) built-in
MPEG-2 compresses 1 Gb/s video stream One 6 MHz Channel can carry 20 Mbits/sec or
several DTV (HDTV and SDTV) sub channelsand other data (8-VSB and QAM)
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2008 TV Receivers Sets with HD display and no tuners (HD
ready or HD monitor)
Sets with HD display, NTSC/ATSC andQAM tuners with or without cable cards(most common)
Sets with SD display (LCD or CRT) andNTSC/ATSC tuner (least expensive)
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Frequency Allocation Old Assignments: VHF (Ch. 2-13) and
UHF (Ch. 14-68)
New Assignments: Upper VHF, lower UHF(Ch. 7-53)
Government Will Auction the Vacated
Channels for $$ Billions, is issuing rebatecoupons for converter boxes
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What are Broadcasters Doing Broadcasters take advantage of uninformed
public
Saving on Quality for Profits more channels,less HD
Few Broadcasters provide a consistent true HDSignal
Basic Cable May or May not Include DigitalChannels
Cable and satellite providers degrade the HDsignal by further compressing it
Over-the-air still the best not publicized and
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Transmission and ModulationNTSC/ATSC/QAM Tuners
Video Stream
1 Gbit/sec
+
MPEG-2
20 Mbits/sec
QAM(Cable)
6 MHz
8-VSB (OTA)
6 MHz
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Digital Transmission 6 MHz Channel
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Are You Watching HDTV? Sleeping in the Garage Doesn't Make You
a Car
Nearly half of the 24 million householdswith HDTVs don't actually watch high-definition programs
HDTV Material Doesn't Grow on Trees
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Where are the Digital Signals
Coming from Digital Cable
Satellite (Dish Network)
Over the Air A well kept secret. An oldantenna, even rabbit ears will often do
Blue Ray DVDs and other new formats
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Plasma, LCD and DLP Displays
Plasma Generates its own light, vivid colors,best viewing angle, but subject to burn-in,
ambient light a problem (glare, reflections) LCD Backlit, (Venetian blinds) good pastel
colors, poor blacks, low power consumption, lowweight, good in lighted areas, 42 or less
DLP Reflected light (Rear projection), brightcolors, relatively expensive, fragile, 50 and up,
www.howstuffworks.com/lcd2.htm
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Plasma Display
Panel Cross Section
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Plasma Display
Cell arrangement
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LCD Display
More Details
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DLP (Projection) Display
How it works
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How to Hook Up HDTV to YourSystem (A/V Components)
Over-the-air and cable combination
Analog vs. digital cable (cable cards, boxes)
Use of additional tuners (VCR, ATSC)
Analog and digital audio to your HiFi
Use with Laptop as Monitor
DVD Player Games, computer and other components
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How to Hook Up HDTV to YourSystem (Inputs and Outputs)
Varies between Manufacturers and Models
Composite - AVI (3 RCA cables)
Component (5 RCA cables)
HDMI
Svideo + audio
RGB (15 pins) + audio Analog Audio (Stereo)
Digital Audio (5.1)
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How to Hook Up HDTV to YourSystem (OTA and Analog Cable)
Combining Over-the air with analog cable
VCR
HDTV
Antenna
Cable AV1
DTV/TV
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Recording of HD/SD Programs
Lack of video outputs on most HDTV setsmakes recording difficult (DRM raises its uglyhead)
Recording to PC hard drive with external ATSCtuner
Regular VCR if analog output available fromHDTV or digital cable box
TiVo recording to hard drive
DVRs with built-in ATSC/QAM tuners and DVDrecording media coming down in price
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Pinnacle PCTV HD Stick
.
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HD Picture on PC Screen
.
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Current HD/SD Programming
Networks simulcast their main analog channel
Plenty of weather channels
News, sports, specials and some shows in HD
PBS carries a separate HD channel with highquality documentaries, cultural and scienceprograms (3 hour operas from the MET, fullconcerts, etc)
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Government Coupon Program
Analog OTA transmission will cease on2/17/2009
Between 1/1/08 and 3/31/09 you can call1-888-388-2009 to apply
1-2 $40 Rebate coupons per household
Coupons expire 90 days after issueATSC to analog converters will give new
life to old TVs and VCRs
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Consumer Guide
Fit Size to Your Viewing Area
Built-in ATSC/QAM tuner or HD-Ready
Plasma. LCD or DLP
Availability of Inputs and Outputs
Price, warranties, repair cost
Ask questions on alt.tv.tech.hdtv andcheck http://www.avsforum.com
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Additional Resources
Converter box site:www.dtv2009.gov:
Find out about OTA reception at yourhome:www.antennaweb.org
Quiz to tell if you are ready for HDTV:www.dtvtransition.org: